Genome-Wide Association Study and QTL Mapping Reveal Genomic Loci Associated with Fusarium Ear Rot Resistance in Tropical Maize Germplasm.

摘要: Fusarium ear rot (FER) incited by verticillioides is a major disease of maize that reduces grain quality globally. Host resistance the most suitable strategy for managing disease. We report results genome-wide association study (GWAS) to detect alleles associated with increased FER in set 818 tropical inbred lines evaluated three environments. Association tests performed using 43,424 single-nucleotide polymorphic (SNPs) markers identified 45 SNPs and 15 haplotypes were significantly resistance. Each SNP locus had relatively small additive effects on accounted 1–4% trait variation. These located within or adjacent 38 candidate genes, 21 which genes plant tolerance stresses, including Linkage mapping four biparental populations validate GWAS quantitative loci (QTL) F. Integration QTL physical map showed eight colocated chromosomes 2, 3, 4, 5, 9, 10. 2 9 are new. reveal complex conditioned multiple minor effects. The value selection improving limited; rather, combine effect combined genomic polygenic background both target general adaptation traits might be fruitful increasing maize.